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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: Value.GetFunction.html 842 2015-03-07 18:20:42Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.parse.expr;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.google.common.base.Function;<a name="line.10"></a>
<span class="sourceLineNo">011</span><a name="line.11"></a>
<span class="sourceLineNo">012</span>import org.jsimpledb.parse.ParseSession;<a name="line.12"></a>
<span class="sourceLineNo">013</span><a name="line.13"></a>
<span class="sourceLineNo">014</span>/**<a name="line.14"></a>
<span class="sourceLineNo">015</span> * Holds a value for use during expression evaluation.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span>public interface Value {<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>    /** Flag mask value for use with {@link #compare compare()}. */<a name="line.19"></a>
<span class="sourceLineNo">020</span>    int LT = 0x01;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>    /** Flag mask value for use with {@link #compare compare()}. */<a name="line.22"></a>
<span class="sourceLineNo">023</span>    int GT = 0x02;<a name="line.23"></a>
<span class="sourceLineNo">024</span><a name="line.24"></a>
<span class="sourceLineNo">025</span>    /** Flag mask value for use with {@link #compare compare()}. */<a name="line.25"></a>
<span class="sourceLineNo">026</span>    int EQ = 0x04;<a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span>    /**<a name="line.28"></a>
<span class="sourceLineNo">029</span>     * Special value that can be used to indicate "no value" in certain situations, such as return value<a name="line.29"></a>
<span class="sourceLineNo">030</span>     * from a method returning void. Actually evaluates to null.<a name="line.30"></a>
<span class="sourceLineNo">031</span>     */<a name="line.31"></a>
<span class="sourceLineNo">032</span>    Value NO_VALUE = new ConstValue(null);<a name="line.32"></a>
<span class="sourceLineNo">033</span><a name="line.33"></a>
<span class="sourceLineNo">034</span>    /**<a name="line.34"></a>
<span class="sourceLineNo">035</span>     * Evaluate this value within the given context.<a name="line.35"></a>
<span class="sourceLineNo">036</span>     *<a name="line.36"></a>
<span class="sourceLineNo">037</span>     * &lt;p&gt;<a name="line.37"></a>
<span class="sourceLineNo">038</span>     * Normally this method should only be invoked once, and the result cached, because evaluation could have side effects.<a name="line.38"></a>
<span class="sourceLineNo">039</span>     * &lt;/p&gt;<a name="line.39"></a>
<span class="sourceLineNo">040</span>     *<a name="line.40"></a>
<span class="sourceLineNo">041</span>     * @param session parse session<a name="line.41"></a>
<span class="sourceLineNo">042</span>     * @return the evaluated result<a name="line.42"></a>
<span class="sourceLineNo">043</span>     */<a name="line.43"></a>
<span class="sourceLineNo">044</span>    Object get(ParseSession session);<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>    /**<a name="line.46"></a>
<span class="sourceLineNo">047</span>     * Evaluate this value, verify that it is not null, and return it.<a name="line.47"></a>
<span class="sourceLineNo">048</span>     *<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * @param session current session<a name="line.49"></a>
<span class="sourceLineNo">050</span>     * @param operation description of operation for error messages<a name="line.50"></a>
<span class="sourceLineNo">051</span>     * @return the evaluated result<a name="line.51"></a>
<span class="sourceLineNo">052</span>     * @throws EvalException if this value is null<a name="line.52"></a>
<span class="sourceLineNo">053</span>     */<a name="line.53"></a>
<span class="sourceLineNo">054</span>    Object checkNotNull(ParseSession session, String operation);<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span>    /**<a name="line.56"></a>
<span class="sourceLineNo">057</span>     * Evaluate this value, verify that it has boolean type, and return it.<a name="line.57"></a>
<span class="sourceLineNo">058</span>     *<a name="line.58"></a>
<span class="sourceLineNo">059</span>     * @param session current session<a name="line.59"></a>
<span class="sourceLineNo">060</span>     * @param operation description of operation for error messages<a name="line.60"></a>
<span class="sourceLineNo">061</span>     * @return the evaluated boolean value<a name="line.61"></a>
<span class="sourceLineNo">062</span>     * @throws EvalException if this value is not boolean<a name="line.62"></a>
<span class="sourceLineNo">063</span>     */<a name="line.63"></a>
<span class="sourceLineNo">064</span>    boolean checkBoolean(ParseSession session, String operation);<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span>    /**<a name="line.66"></a>
<span class="sourceLineNo">067</span>     * Evaluate this value, verify that it has numeric type (i.e., {@link Number}), and return it.<a name="line.67"></a>
<span class="sourceLineNo">068</span>     *<a name="line.68"></a>
<span class="sourceLineNo">069</span>     * @param session current session<a name="line.69"></a>
<span class="sourceLineNo">070</span>     * @param operation description of operation for error messages<a name="line.70"></a>
<span class="sourceLineNo">071</span>     * @return the evaluated numeric value<a name="line.71"></a>
<span class="sourceLineNo">072</span>     * @throws EvalException if this value is not numeric<a name="line.72"></a>
<span class="sourceLineNo">073</span>     */<a name="line.73"></a>
<span class="sourceLineNo">074</span>    Number checkNumeric(ParseSession session, String operation);<a name="line.74"></a>
<span class="sourceLineNo">075</span><a name="line.75"></a>
<span class="sourceLineNo">076</span>    /**<a name="line.76"></a>
<span class="sourceLineNo">077</span>     * Evaluate this value, verify that it has integral type (i.e., byte, char, short, or int), and return it.<a name="line.77"></a>
<span class="sourceLineNo">078</span>     * Return its integer value.<a name="line.78"></a>
<span class="sourceLineNo">079</span>     *<a name="line.79"></a>
<span class="sourceLineNo">080</span>     * @param session current session<a name="line.80"></a>
<span class="sourceLineNo">081</span>     * @param operation description of operation for error messages<a name="line.81"></a>
<span class="sourceLineNo">082</span>     * @return the evaluated integer value<a name="line.82"></a>
<span class="sourceLineNo">083</span>     * @throws EvalException if this value is not integral<a name="line.83"></a>
<span class="sourceLineNo">084</span>     */<a name="line.84"></a>
<span class="sourceLineNo">085</span>    int checkIntegral(ParseSession session, String operation);<a name="line.85"></a>
<span class="sourceLineNo">086</span><a name="line.86"></a>
<span class="sourceLineNo">087</span>    /**<a name="line.87"></a>
<span class="sourceLineNo">088</span>     * Evaluate this value, verify that it has the expected type (or any sub-type), and return it.<a name="line.88"></a>
<span class="sourceLineNo">089</span>     * Return its value cast to that type.<a name="line.89"></a>
<span class="sourceLineNo">090</span>     *<a name="line.90"></a>
<span class="sourceLineNo">091</span>     * @param session current session<a name="line.91"></a>
<span class="sourceLineNo">092</span>     * @param operation description of operation for error messages<a name="line.92"></a>
<span class="sourceLineNo">093</span>     * @param type expected type<a name="line.93"></a>
<span class="sourceLineNo">094</span>     * @param &lt;T&gt; expected type<a name="line.94"></a>
<span class="sourceLineNo">095</span>     * @return the evaluated value cast to {@code type}<a name="line.95"></a>
<span class="sourceLineNo">096</span>     * @throws EvalException if this value does not have the expected type<a name="line.96"></a>
<span class="sourceLineNo">097</span>     */<a name="line.97"></a>
<span class="sourceLineNo">098</span>    &lt;T&gt; T checkType(ParseSession session, String operation, Class&lt;T&gt; type);<a name="line.98"></a>
<span class="sourceLineNo">099</span><a name="line.99"></a>
<span class="sourceLineNo">100</span>    /**<a name="line.100"></a>
<span class="sourceLineNo">101</span>     * Increment/decrement this value. Also supports {@link java.math.BigInteger} and {@link java.math.BigDecimal}.<a name="line.101"></a>
<span class="sourceLineNo">102</span>     * This value must be an {@link LValue}.<a name="line.102"></a>
<span class="sourceLineNo">103</span>     *<a name="line.103"></a>
<span class="sourceLineNo">104</span>     * @param session current session<a name="line.104"></a>
<span class="sourceLineNo">105</span>     * @param operation description of operation for error messages<a name="line.105"></a>
<span class="sourceLineNo">106</span>     * @param increment true to increment, false to decrement<a name="line.106"></a>
<span class="sourceLineNo">107</span>     * @return the adjusted value (which will not be an {@link LValue})<a name="line.107"></a>
<span class="sourceLineNo">108</span>     * @throws EvalException if this value is not an {@link LValue}<a name="line.108"></a>
<span class="sourceLineNo">109</span>     * @throws EvalException if this value is not numeric, {@link java.math.BigInteger} or {@link java.math.BigDecimal}<a name="line.109"></a>
<span class="sourceLineNo">110</span>     */<a name="line.110"></a>
<span class="sourceLineNo">111</span>    Value xxcrement(ParseSession session, String operation, boolean increment);<a name="line.111"></a>
<span class="sourceLineNo">112</span><a name="line.112"></a>
<span class="sourceLineNo">113</span>    /**<a name="line.113"></a>
<span class="sourceLineNo">114</span>     * Negate this value.<a name="line.114"></a>
<span class="sourceLineNo">115</span>     *<a name="line.115"></a>
<span class="sourceLineNo">116</span>     * @param session current session<a name="line.116"></a>
<span class="sourceLineNo">117</span>     * @return negated result<a name="line.117"></a>
<span class="sourceLineNo">118</span>     * @throws EvalException if this value is not numeric<a name="line.118"></a>
<span class="sourceLineNo">119</span>     */<a name="line.119"></a>
<span class="sourceLineNo">120</span>    Value negate(ParseSession session);<a name="line.120"></a>
<span class="sourceLineNo">121</span><a name="line.121"></a>
<span class="sourceLineNo">122</span>    /**<a name="line.122"></a>
<span class="sourceLineNo">123</span>     * Bitwise invert this value.<a name="line.123"></a>
<span class="sourceLineNo">124</span>     *<a name="line.124"></a>
<span class="sourceLineNo">125</span>     * @param session current session<a name="line.125"></a>
<span class="sourceLineNo">126</span>     * @return inverted result<a name="line.126"></a>
<span class="sourceLineNo">127</span>     * @throws EvalException if this value is not numeric<a name="line.127"></a>
<span class="sourceLineNo">128</span>     */<a name="line.128"></a>
<span class="sourceLineNo">129</span>    Value invert(ParseSession session);<a name="line.129"></a>
<span class="sourceLineNo">130</span><a name="line.130"></a>
<span class="sourceLineNo">131</span>    /**<a name="line.131"></a>
<span class="sourceLineNo">132</span>     * Multiply this value.<a name="line.132"></a>
<span class="sourceLineNo">133</span>     *<a name="line.133"></a>
<span class="sourceLineNo">134</span>     * @param session current session<a name="line.134"></a>
<span class="sourceLineNo">135</span>     * @param that multiplicand<a name="line.135"></a>
<span class="sourceLineNo">136</span>     * @return multiplied result<a name="line.136"></a>
<span class="sourceLineNo">137</span>     * @throws EvalException if value(s) are not numeric<a name="line.137"></a>
<span class="sourceLineNo">138</span>     */<a name="line.138"></a>
<span class="sourceLineNo">139</span>    Value multiply(ParseSession session, Value that);<a name="line.139"></a>
<span class="sourceLineNo">140</span><a name="line.140"></a>
<span class="sourceLineNo">141</span>    /**<a name="line.141"></a>
<span class="sourceLineNo">142</span>     * Divide this value.<a name="line.142"></a>
<span class="sourceLineNo">143</span>     *<a name="line.143"></a>
<span class="sourceLineNo">144</span>     * @param session current session<a name="line.144"></a>
<span class="sourceLineNo">145</span>     * @param that divisor<a name="line.145"></a>
<span class="sourceLineNo">146</span>     * @return divided result<a name="line.146"></a>
<span class="sourceLineNo">147</span>     * @throws EvalException if value(s) are not numeric<a name="line.147"></a>
<span class="sourceLineNo">148</span>     */<a name="line.148"></a>
<span class="sourceLineNo">149</span>    Value divide(ParseSession session, Value that);<a name="line.149"></a>
<span class="sourceLineNo">150</span><a name="line.150"></a>
<span class="sourceLineNo">151</span>    /**<a name="line.151"></a>
<span class="sourceLineNo">152</span>     * Modulo this value.<a name="line.152"></a>
<span class="sourceLineNo">153</span>     *<a name="line.153"></a>
<span class="sourceLineNo">154</span>     * @param session current session<a name="line.154"></a>
<span class="sourceLineNo">155</span>     * @param that divisor<a name="line.155"></a>
<span class="sourceLineNo">156</span>     * @return remaindered result<a name="line.156"></a>
<span class="sourceLineNo">157</span>     * @throws EvalException if value(s) are not numeric<a name="line.157"></a>
<span class="sourceLineNo">158</span>     */<a name="line.158"></a>
<span class="sourceLineNo">159</span>    Value mod(ParseSession session, Value that);<a name="line.159"></a>
<span class="sourceLineNo">160</span><a name="line.160"></a>
<span class="sourceLineNo">161</span>    /**<a name="line.161"></a>
<span class="sourceLineNo">162</span>     * Add or concatenate this value.<a name="line.162"></a>
<span class="sourceLineNo">163</span>     *<a name="line.163"></a>
<span class="sourceLineNo">164</span>     * @param session current session<a name="line.164"></a>
<span class="sourceLineNo">165</span>     * @param that addend<a name="line.165"></a>
<span class="sourceLineNo">166</span>     * @return added result<a name="line.166"></a>
<span class="sourceLineNo">167</span>     * @throws EvalException if value(s) are not numeric or {@link String}<a name="line.167"></a>
<span class="sourceLineNo">168</span>     */<a name="line.168"></a>
<span class="sourceLineNo">169</span>    Value add(ParseSession session, Value that);<a name="line.169"></a>
<span class="sourceLineNo">170</span><a name="line.170"></a>
<span class="sourceLineNo">171</span>    /**<a name="line.171"></a>
<span class="sourceLineNo">172</span>     * Subtract this value. Also supports {@link java.util.Set} and {@link java.util.NavigableSet} difference.<a name="line.172"></a>
<span class="sourceLineNo">173</span>     *<a name="line.173"></a>
<span class="sourceLineNo">174</span>     * @param session current session<a name="line.174"></a>
<span class="sourceLineNo">175</span>     * @param that subtrahend<a name="line.175"></a>
<span class="sourceLineNo">176</span>     * @return subtracted result<a name="line.176"></a>
<span class="sourceLineNo">177</span>     * @throws EvalException if value(s) are not numeric or {@link java.util.Set}<a name="line.177"></a>
<span class="sourceLineNo">178</span>     */<a name="line.178"></a>
<span class="sourceLineNo">179</span>    Value subtract(ParseSession session, Value that);<a name="line.179"></a>
<span class="sourceLineNo">180</span><a name="line.180"></a>
<span class="sourceLineNo">181</span>    /**<a name="line.181"></a>
<span class="sourceLineNo">182</span>     * Left shift this value.<a name="line.182"></a>
<span class="sourceLineNo">183</span>     *<a name="line.183"></a>
<span class="sourceLineNo">184</span>     * @param session current session<a name="line.184"></a>
<span class="sourceLineNo">185</span>     * @param arg shift amount<a name="line.185"></a>
<span class="sourceLineNo">186</span>     * @return shifted result<a name="line.186"></a>
<span class="sourceLineNo">187</span>     * @throws EvalException if value(s) are not numeric<a name="line.187"></a>
<span class="sourceLineNo">188</span>     */<a name="line.188"></a>
<span class="sourceLineNo">189</span>    Value lshift(ParseSession session, Value arg);<a name="line.189"></a>
<span class="sourceLineNo">190</span><a name="line.190"></a>
<span class="sourceLineNo">191</span>    /**<a name="line.191"></a>
<span class="sourceLineNo">192</span>     * Right shift this value.<a name="line.192"></a>
<span class="sourceLineNo">193</span>     *<a name="line.193"></a>
<span class="sourceLineNo">194</span>     * @param session current session<a name="line.194"></a>
<span class="sourceLineNo">195</span>     * @param arg shift amount<a name="line.195"></a>
<span class="sourceLineNo">196</span>     * @return shifted result<a name="line.196"></a>
<span class="sourceLineNo">197</span>     * @throws EvalException if value(s) are not numeric<a name="line.197"></a>
<span class="sourceLineNo">198</span>     */<a name="line.198"></a>
<span class="sourceLineNo">199</span>    Value rshift(ParseSession session, Value arg);<a name="line.199"></a>
<span class="sourceLineNo">200</span><a name="line.200"></a>
<span class="sourceLineNo">201</span>    /**<a name="line.201"></a>
<span class="sourceLineNo">202</span>     * Unsigned right shift this value.<a name="line.202"></a>
<span class="sourceLineNo">203</span>     *<a name="line.203"></a>
<span class="sourceLineNo">204</span>     * @param session current session<a name="line.204"></a>
<span class="sourceLineNo">205</span>     * @param arg shift amount<a name="line.205"></a>
<span class="sourceLineNo">206</span>     * @return shifted result<a name="line.206"></a>
<span class="sourceLineNo">207</span>     * @throws EvalException if value(s) are not numeric<a name="line.207"></a>
<span class="sourceLineNo">208</span>     */<a name="line.208"></a>
<span class="sourceLineNo">209</span>    Value urshift(ParseSession session, Value arg);<a name="line.209"></a>
<span class="sourceLineNo">210</span><a name="line.210"></a>
<span class="sourceLineNo">211</span>    /**<a name="line.211"></a>
<span class="sourceLineNo">212</span>     * And this value. Also supports {@link java.util.Set} and {@link java.util.NavigableSet} intersection.<a name="line.212"></a>
<span class="sourceLineNo">213</span>     *<a name="line.213"></a>
<span class="sourceLineNo">214</span>     * @param session current session<a name="line.214"></a>
<span class="sourceLineNo">215</span>     * @param that and value<a name="line.215"></a>
<span class="sourceLineNo">216</span>     * @return and'ed result<a name="line.216"></a>
<span class="sourceLineNo">217</span>     * @throws EvalException if value(s) are not numeric, boolean, or {@link java.util.Set}<a name="line.217"></a>
<span class="sourceLineNo">218</span>     */<a name="line.218"></a>
<span class="sourceLineNo">219</span>    Value and(ParseSession session, Value that);<a name="line.219"></a>
<span class="sourceLineNo">220</span><a name="line.220"></a>
<span class="sourceLineNo">221</span>    /**<a name="line.221"></a>
<span class="sourceLineNo">222</span>     * Or this value. Also supports {@link java.util.Set} and {@link java.util.NavigableSet} union.<a name="line.222"></a>
<span class="sourceLineNo">223</span>     *<a name="line.223"></a>
<span class="sourceLineNo">224</span>     * @param session current session<a name="line.224"></a>
<span class="sourceLineNo">225</span>     * @param that or value<a name="line.225"></a>
<span class="sourceLineNo">226</span>     * @return or'ed result<a name="line.226"></a>
<span class="sourceLineNo">227</span>     * @throws EvalException if value(s) are not numeric, boolean, or {@link java.util.Set}<a name="line.227"></a>
<span class="sourceLineNo">228</span>     */<a name="line.228"></a>
<span class="sourceLineNo">229</span>    Value or(ParseSession session, Value that);<a name="line.229"></a>
<span class="sourceLineNo">230</span><a name="line.230"></a>
<span class="sourceLineNo">231</span>    /**<a name="line.231"></a>
<span class="sourceLineNo">232</span>     * Xor this value. Also supports {@link java.util.Set} and {@link java.util.NavigableSet} symmetric difference.<a name="line.232"></a>
<span class="sourceLineNo">233</span>     *<a name="line.233"></a>
<span class="sourceLineNo">234</span>     * @param session current session<a name="line.234"></a>
<span class="sourceLineNo">235</span>     * @param that xor value<a name="line.235"></a>
<span class="sourceLineNo">236</span>     * @return exclusive or'ed result<a name="line.236"></a>
<span class="sourceLineNo">237</span>     * @throws EvalException if value(s) are not numeric or boolean<a name="line.237"></a>
<span class="sourceLineNo">238</span>     */<a name="line.238"></a>
<span class="sourceLineNo">239</span>    Value xor(ParseSession session, Value that);<a name="line.239"></a>
<span class="sourceLineNo">240</span><a name="line.240"></a>
<span class="sourceLineNo">241</span>    /**<a name="line.241"></a>
<span class="sourceLineNo">242</span>     * Ordered comparison to another value. Supports numeric and {@link Comparable} comparison.<a name="line.242"></a>
<span class="sourceLineNo">243</span>     *<a name="line.243"></a>
<span class="sourceLineNo">244</span>     * @param session current session<a name="line.244"></a>
<span class="sourceLineNo">245</span>     * @param that value to compare to<a name="line.245"></a>
<span class="sourceLineNo">246</span>     * @param mask bit mask with bits {@link #LT}, {@link #GT}, and/or {@link #EQ}<a name="line.246"></a>
<span class="sourceLineNo">247</span>     * @return boolean value which will be true if the comparison is true<a name="line.247"></a>
<span class="sourceLineNo">248</span>     * @throws EvalException if value(s) are not numeric or mutually {@link Comparable}<a name="line.248"></a>
<span class="sourceLineNo">249</span>     */<a name="line.249"></a>
<span class="sourceLineNo">250</span>    Value compare(ParseSession session, Value that, int mask);<a name="line.250"></a>
<span class="sourceLineNo">251</span><a name="line.251"></a>
<span class="sourceLineNo">252</span>    /**<a name="line.252"></a>
<span class="sourceLineNo">253</span>     * Verify that this instance is actually an {@link LValue}.<a name="line.253"></a>
<span class="sourceLineNo">254</span>     *<a name="line.254"></a>
<span class="sourceLineNo">255</span>     * @param operation description of operation for error messages<a name="line.255"></a>
<span class="sourceLineNo">256</span>     * @return this instance cast to {@link LValue}<a name="line.256"></a>
<span class="sourceLineNo">257</span>     * @throws EvalException if this instance is not an {@link LValue}<a name="line.257"></a>
<span class="sourceLineNo">258</span>     */<a name="line.258"></a>
<span class="sourceLineNo">259</span>    LValue asLValue(String operation);<a name="line.259"></a>
<span class="sourceLineNo">260</span><a name="line.260"></a>
<span class="sourceLineNo">261</span>    /**<a name="line.261"></a>
<span class="sourceLineNo">262</span>     * Function that evaluates (i.e., invokes {@link #get Value.get()}) on its argument.<a name="line.262"></a>
<span class="sourceLineNo">263</span>     */<a name="line.263"></a>
<span class="sourceLineNo">264</span>    public static class GetFunction implements Function&lt;Value, Object&gt; {<a name="line.264"></a>
<span class="sourceLineNo">265</span><a name="line.265"></a>
<span class="sourceLineNo">266</span>        private final ParseSession session;<a name="line.266"></a>
<span class="sourceLineNo">267</span><a name="line.267"></a>
<span class="sourceLineNo">268</span>        public GetFunction(ParseSession session) {<a name="line.268"></a>
<span class="sourceLineNo">269</span>            if (session == null)<a name="line.269"></a>
<span class="sourceLineNo">270</span>                throw new IllegalArgumentException("null session");<a name="line.270"></a>
<span class="sourceLineNo">271</span>            this.session = session;<a name="line.271"></a>
<span class="sourceLineNo">272</span>        }<a name="line.272"></a>
<span class="sourceLineNo">273</span><a name="line.273"></a>
<span class="sourceLineNo">274</span>        @Override<a name="line.274"></a>
<span class="sourceLineNo">275</span>        public Object apply(Value item) {<a name="line.275"></a>
<span class="sourceLineNo">276</span>            return item.get(this.session);<a name="line.276"></a>
<span class="sourceLineNo">277</span>        }<a name="line.277"></a>
<span class="sourceLineNo">278</span>    }<a name="line.278"></a>
<span class="sourceLineNo">279</span>}<a name="line.279"></a>
<span class="sourceLineNo">280</span><a name="line.280"></a>




























































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